[PATCH] selftests: add headers_install to lib.mk

[Anders Roxell]

If the kernel headers aren't installed we can't build all the tests.
Add a new make target rule 'khdr' in the file lib.mk to generate the
kernel headers and that gets include for every test-dir Makefile that
includes lib.mk If the testdir in turn have its own sub-dirs the
top_srcdir needs to be set to the linux-rootdir to be able to generate
the kernel headers.

Signed-off-by: Anders Roxell <anders.roxell@xxxxxxxxxx>
Reviewed-by: Fathi Boudra <fathi.boudra@xxxxxxxxxx>
---
 tools/testing/selftests/android/Makefile          | 2 +-
 tools/testing/selftests/android/ion/Makefile      | 1 +
 tools/testing/selftests/bpf/Makefile              | 5 ++---
 tools/testing/selftests/futex/functional/Makefile | 1 +
 tools/testing/selftests/gpio/Makefile             | 4 ----
 tools/testing/selftests/kvm/Makefile              | 6 +-----
 tools/testing/selftests/lib.mk                    | 8 ++++++++
 tools/testing/selftests/vm/Makefile               | 3 ---
 8 files changed, 14 insertions(+), 16 deletions(-)

diff --git a/tools/testing/selftests/android/Makefile b/tools/testing/selftests/android/Makefile
index f6304d2be90c..087390bbad68 100644
--- a/tools/testing/selftests/android/Makefile
+++ b/tools/testing/selftests/android/Makefile
@@ -6,7 +6,7 @@ TEST_PROGS := run.sh
 
 include ../lib.mk
 
-all:
+all: khdr
 	@for DIR in $(SUBDIRS); do		\
 		BUILD_TARGET=$(OUTPUT)/$$DIR;	\
 		mkdir $$BUILD_TARGET  -p;	\
diff --git a/tools/testing/selftests/android/ion/Makefile b/tools/testing/selftests/android/ion/Makefile
index e03695287f76..14ecd9805748 100644
--- a/tools/testing/selftests/android/ion/Makefile
+++ b/tools/testing/selftests/android/ion/Makefile
@@ -11,6 +11,7 @@ $(TEST_GEN_FILES): ipcsocket.c ionutils.c
 TEST_PROGS := ion_test.sh
 
 include ../../lib.mk
+top_srcdir = ../../../../../
 
 $(OUTPUT)/ionapp_export: ionapp_export.c ipcsocket.c ionutils.c
 $(OUTPUT)/ionapp_import: ionapp_import.c ipcsocket.c ionutils.c
diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index 0a315ddabbf4..cc611a284087 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -16,9 +16,8 @@ LDLIBS += -lcap -lelf -lrt -lpthread
 TEST_CUSTOM_PROGS = $(OUTPUT)/urandom_read
 all: $(TEST_CUSTOM_PROGS)
 
-$(TEST_CUSTOM_PROGS): urandom_read
-
-urandom_read: urandom_read.c
+$(TEST_CUSTOM_PROGS):| khdr
+$(TEST_CUSTOM_PROGS): urandom_read.c
 	$(CC) -o $(TEST_CUSTOM_PROGS) -static $<
 
 # Order correspond to 'make run_tests' order
diff --git a/tools/testing/selftests/futex/functional/Makefile b/tools/testing/selftests/futex/functional/Makefile
index ff8feca49746..9f602fb40241 100644
--- a/tools/testing/selftests/futex/functional/Makefile
+++ b/tools/testing/selftests/futex/functional/Makefile
@@ -19,5 +19,6 @@ TEST_GEN_FILES := \
 TEST_PROGS := run.sh
 
 include ../../lib.mk
+top_srcdir = ../../../../../
 
 $(TEST_GEN_FILES): $(HEADERS)
diff --git a/tools/testing/selftests/gpio/Makefile b/tools/testing/selftests/gpio/Makefile
index 1bbb47565c55..768b2be010db 100644
--- a/tools/testing/selftests/gpio/Makefile
+++ b/tools/testing/selftests/gpio/Makefile
@@ -25,7 +25,3 @@ $(BINARIES): ../../../gpio/gpio-utils.o ../../../../usr/include/linux/gpio.h
 
 ../../../gpio/gpio-utils.o:
 	make ARCH=$(ARCH) CROSS_COMPILE=$(CROSS_COMPILE) -C ../../../gpio
-
-../../../../usr/include/linux/gpio.h:
-	make -C ../../../.. headers_install INSTALL_HDR_PATH=$(shell pwd)/../../../../usr/
-
diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
index dc44de904797..ba03ce334212 100644
--- a/tools/testing/selftests/kvm/Makefile
+++ b/tools/testing/selftests/kvm/Makefile
@@ -31,9 +31,5 @@ $(LIBKVM_OBJ): $(OUTPUT)/%.o: %.c
 $(OUTPUT)/libkvm.a: $(LIBKVM_OBJ)
 	$(AR) crs $@ $^
 
-$(LINUX_HDR_PATH):
-	make -C $(top_srcdir) headers_install
-
-all: $(STATIC_LIBS) $(LINUX_HDR_PATH)
+all: $(STATIC_LIBS)
 $(TEST_GEN_PROGS): $(STATIC_LIBS)
-$(TEST_GEN_PROGS) $(LIBKVM_OBJ): | $(LINUX_HDR_PATH)
diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
index 195e9d4739a9..e0bfbc5b1f1f 100644
--- a/tools/testing/selftests/lib.mk
+++ b/tools/testing/selftests/lib.mk
@@ -16,8 +16,16 @@ TEST_GEN_PROGS := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_PROGS))
 TEST_GEN_PROGS_EXTENDED := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_PROGS_EXTENDED))
 TEST_GEN_FILES := $(patsubst %,$(OUTPUT)/%,$(TEST_GEN_FILES))
 
+top_srcdir ?= ../../../../
+
 all: $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES)
 
+.PHONY: khdr
+khdr:
+	make -C $(top_srcdir) headers_install
+
+$(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES):| khdr
+
 .ONESHELL:
 define RUN_TESTS
 	@export KSFT_TAP_LEVEL=`echo 1`;
diff --git a/tools/testing/selftests/vm/Makefile b/tools/testing/selftests/vm/Makefile
index fdefa2295ddc..1e34a40745ef 100644
--- a/tools/testing/selftests/vm/Makefile
+++ b/tools/testing/selftests/vm/Makefile
@@ -29,6 +29,3 @@ $(OUTPUT)/userfaultfd: ../../../../usr/include/linux/kernel.h
 $(OUTPUT)/userfaultfd: LDLIBS += -lpthread
 
 $(OUTPUT)/mlock-random-test: LDLIBS += -lcap
-
-../../../../usr/include/linux/kernel.h:
-	make -C ../../../.. headers_install
-- 
2.16.3